eschler



No Model.

0. RICHTER & R. T-ESGHLER.

ELECTRIC ARG LAMP.

No. 573,162. Patented Dec. 15, 1896.

I INVENT WITTNESSEE:

UNITED STATES PATENT OFFICE.

CHARLES RICHTER AND RICHARD T. ESCHLER, OF CAMDEN, NE\V JERSEY,ASSIGNORS OF ONE-THIRD TO SAMUEL B. GOFF, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 573,162, dated December15, 1896.

Applicationfiled April 9, 1896. Serial No. 586,814. (No modelh To ctZZwhom it may concern.-

Be it known that we, CHARLES RICHTER, a citizen of the United States,and RICHARD T. ESOHLER, a subject of the Emperor of Germany, residing inthe city and county of Cainden, State of New Jersey, have invented a newand useful Improvement in Electric-Arc Lamps, which improvement is fullyset forth in the followingspecification and accompanying drawings.

Our invention consists of an electric-arc lamp of the clutch type, inwhich the brass carbon-rod is dispensed with, the lamp is shortened, andthe operation of the lamp is more eitective. To this end we employ anovel clutch, constructed as hereinafter described and claimed, whichWill directly e11- gage with the carbon and firmly hold the same andlikewise allow it to slip easily when feeding.

Figure 1 represents a partial side elevation and partial verticalsection of a portion of an electric-arc lamp embodying our invention.Fig. 2 represents a view of, a detached portion on an enlarged scale.Fig. 3 represents a top view of portion of the clutch and horizontalsection of thecarbon.

Similar letters of reference indicate corresponding parts in the severalfigures.

Referring to the drawings, A designates a spool or solenoid, and Bdesignates rods which hold the lower part of the lamp (not shown) andare properlyinsulated from said solenoid.

C designates guide-rods which are in metallic contact with the body ofthe solenoid and depend therefrom. Within the solenoid is the annularcore or armature D thereof.

Connected with one of the rods C is the adjustable stop E for limitingthe movement of cross-head J and have fulcrumed thereon the links L,whose lower ends are pivoted to the clutch proper, M, the latterconsisting of two plates or leaves hinged together and having at eachside of their joints an opening to receive the rollers N and the carbonC, the latter being adapted to be embraced at opposite places by therollers.

1- designates a spring or elastic arm which is secured to one of theleaves of the clutch M and carrying the roller Q, which is in contactwith the carbon, said spring or arm being connected with the metalbodyof the solenoid by means of the flexible cable AC R designates agravitating tooth or dog which is mounted on one of the leaves of theclutch and having its point or nose adapted toengage the groove S in theupper end of the carbon when the latter has lowered to about its fullextent, said dog having c011- nected with it the lever or rod T forraising and releasing it from engagement with the carbon.

U designates a plate through which the carbon freely passes and which isadj ustably secured to the rods 0 and freely fitted 011 the rods B, soas to be raised and lowered thereon, said plate being of such width ordiameter as to cover the globe of the lamp and act as a guard forpreventing the heat from reaching the works of the lamp above saidplate.

The operation is as follows: \Vhen no current is flowing, the armatureor core D will strike the stop E and the clutch M rest on the guard orplate U as a stop and thus open, allowing the carbon to pass freelybetween the rollers N. \Vhen the current is turned on, the solenoid willraise the armature and with it the clutch attached thereto. The upperend of the leaves of the clutch thus approach, whereby the rollers arepressed against the carbon, so that the latter also descends, and thearc is accordingly formed, the length of the same being regulated by thestop E and plate or guard U. Owing to the air-pump G, whose plunger isconnected with the core, a cushion is provided above said plunger, whichcauses the core to rise slowly and not violently, the former being quitedesirable. As the carbon is consumed the core gradually descends,endeavoring to keep the are constant. hen the clutch again contacts withthe plate or guard V and the core I00 continues to descend, the clutchwill open, that is to say, the angle of the leaves will become greater,whereby the rollers will release their grip on the carbon and allow thelatter to lower. lVhen the arc has attained its proper length, the corewill again ascend, thereby gripping the rollers against the carbon andstopping the further descent of the latter. The dog R rests against theside of the carbon until the groove S reaches the nose thereof, when itdrops into the same, whereby the carbon is controlled by said dog andthe farther descent of the carbon prevented, when the lamp will beextinguished. Owing to the rollers the feed of the carbon will be evenand so be very satisfactory, even where a rough carbon is employed.

\Vhen a new carbon is required, the lever T is raised, when the fragmentof the old carbon may drop out, after which a fresh carbon may be fittedin place.

In order to prevent the slipping of the clutch-rollers on the carbon,especially in the movement of striking of the are, we employ the springV, which is attached to the limbs L or, if desired, to the leaves of theclutch for closing said leaves and bringing them together.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. An electric-arc lamp having a solenoid with an armature, guide-rodsfor said armature connected with the body of said solenoid, a stop onsaid rod for said armature, an airpump on said'solenoid having a plungerconnected by links with saidarmature, said parts being combinedsubstantially as described.

2. In ELII'QlGClZIlC-ZLIO lamp, a solenoid'with an armature having across-head guided on rods depending from the metallic body of saidsolenoid, links pivoted to ears on said crosshead, and plates pivotallyconnected with said links, and having rollers mounted thereon adapted tocontact with a carbon said parts being combined substantially asdescribed.

o. A clutch formed with a leaf, a roller mounted on said leaf, anelastic arm on said leaf and a roller on said arm substantially asdescribed.

l. In an electric-arc lamp, a clutch formed of leaves, links pivotallyconnected with said leaves, a core attached to said links, and a rollermounted on either of said leaves, adapted to engage the carbon of thelamp, substantially as described.

5. In an electric-arc lamp, a solenoid with an armature having across-head with links connected therewith plates pi votall y attached tosaid links and having rollers mounted thereon, and a weighted dogmounted on one of said plates, said parts being combined substantiallyas described.

6. In an electric-arc lamp a solenoid with an armature having a cross-head, clutchplates pivotally connected by links with said cross-headand carrying rollers in recesses therein and an elastic arm connectedwith one of said plates, and carrying a roller adapted to bear against acarbon which is between said plate-rollers, and a flexible cableconnecting said arm and the body of the solenoid, said parts beingcombined substantially as described.

'7. In an electric-arc lamp, a solenoid with an armature having across-head, links pivoted to said cross-head, clutch-leaves pivoted tosaid links and carrying rollers mounted in recesses therein, an armconnected with one of said leaves, a roller on said arm, a flexiblecable connecting said arm with the metallic body of the solenoid, and aspring connected with said links, said parts being combinedsubstantially as described.

CHARLES RlCll'lEli RICHARD 'l. ESCI'lL'EI-t.

\Vitnesses:

JOHN A. IVIEDERsI-IEIM, M. G. LUKENs.

